/**
 * 项目名称：quickstart-zookeeper 
 * 文件名：ExampleServer.java
 * 版本信息：
 * 日期：2017年7月19日
 * Copyright youngzil Corporation 2017
 * 版权所有 *
 */
package org.quickstart.zookeeper.curator.xdiscovery;

import java.io.Closeable;
import java.io.IOException;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.utils.CloseableUtils;
import org.apache.curator.x.discovery.ServiceDiscovery;
import org.apache.curator.x.discovery.ServiceDiscoveryBuilder;
import org.apache.curator.x.discovery.ServiceInstance;
import org.apache.curator.x.discovery.UriSpec;
import org.apache.curator.x.discovery.details.JsonInstanceSerializer;

/**
 * ExampleServer 
 *  
 * @author：youngzil@163.com
 * @2017年7月19日 下午9:43:52 
 * @version 2.0
 */
/**
 * This shows a very simplified method of registering an instance with the service discovery. Each individual instance in your distributed set of applications would create an instance of something
 * similar to ExampleServer, start it when the application comes up and close it when the application shuts down.
 */
public class ExampleServer implements Closeable {
    private final ServiceDiscovery<InstanceDetails> serviceDiscovery;
    private final ServiceInstance<InstanceDetails> thisInstance;

    public ExampleServer(CuratorFramework client, String path, String serviceName, String description) throws Exception {
        // in a real application, you'd have a convention of some kind for the
        // URI layout
        UriSpec uriSpec = new UriSpec("{scheme}://foo.com:{port}");
        thisInstance = ServiceInstance.<InstanceDetails>builder().name(serviceName).payload(new InstanceDetails(description)).port((int) (65535 * Math.random())) // in a real application,
                                                                                                                                                                  // you'd use a common
                                                                                                                                                                  // port
                .uriSpec(uriSpec).build();
        // if you mark your payload class with @JsonRootName the provided
        // JsonInstanceSerializer will work
        JsonInstanceSerializer<InstanceDetails> serializer = new JsonInstanceSerializer<InstanceDetails>(InstanceDetails.class);
        serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class).client(client).basePath(path).serializer(serializer).thisInstance(thisInstance).build();
    }

    public ServiceInstance<InstanceDetails> getThisInstance() {
        return thisInstance;
    }

    public void start() throws Exception {
        serviceDiscovery.start();
    }

    @Override
    public void close() throws IOException {
        CloseableUtils.closeQuietly(serviceDiscovery);
    }
}
